[2] ALLEN J.Maintaining knowledge about temporal intervals[J].Communications of the ACM, 1983, 26(11):832-843.
[3] ALLEN J.Towards a general theory of action and time[J].Artificial Intelligence, 1984, 23(2):123-154.
[4] D F CHTER R, MEIRI I, PEARL J.Temporal constraint networks[J].Artificial Intelligence, 1991, 49:61-95.
[5] GEREVINI A, SCHUBERT L.Efficient algorithms for qualitative reasoning about time[J].Artificial Intelligence, 1995, 74:207-248.
[10] MUSCETTOLA N, NAYAK P P, PELL B, et al.Remote agent:To boldly go where no AI system has gone before[J].Artificial Intelligence, 1998, 103(1/2):5-47.